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Microwave-assisted synthesis of Zn-Fe adsorbent supported on alumina: Effect of Zn to Fe ratio on syngas desulfurization performance
Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2021-07-26 , DOI: 10.1016/j.cep.2021.108565
Dicka Ar Rahim 1, 2 , Wei Fang 1 , Gaojun Zhu 1 , Haryo Wibowo 1 , Dwi Hantoko 1, 2 , Qing Hu 3 , Herri Susanto 2 , Zengliang Gao 1 , Mi Yan 1
Affiliation  

Before syngas from gasification of biomass could be used as synthesis fuel or chemical feedstock, it requires the removal of hydrogen sulfide (H2S) to meet the purity standard level of those applications. In this study, Zn-Fe/Al2O3 were successfully synthesized by a microwave-assisted wet incipient impregnation technique for use as adsorbent for H2S removal. The characterization of synthesized adsorbents showed that the oxide form of Zn and Fe present on the surface of adsorbents were zinc oxide (ZnO), magnetite (Fe3O4), and zinc ferrite (ZnFe2O4). While the reduction of adsorbent was mostly due to that of iron oxide. The reduced adsorbents might consist of ZnO/Fe3O4/FeO/Fe on alumina as support. At relatively high space velocity (26,000 h−1) the adsorbents were able to reduce the H2S concentration from 250 ppm at the inlet to around 45 ppm, 35 ppm, and 25 ppm at the outlet by adsorbent 1ZnFe, 2ZnFe, and 3ZnFe; respectively. The removal efficiency for adsorbent 1ZnFe, 2ZnFe, and 3ZnFe were 82%, 86%, and 90%; respectively. Results also shown an increase in adsorbent lifetime with the increase of the Zn to Fe ratio.



中文翻译:

氧化铝负载锌铁吸附剂的微波辅助合成:锌铁比对合成气脱硫性能的影响

在将生物质气化产生的合成气用作合成燃料或化学原料之前,需要去除硫化氢 (H 2 S) 以满足这些应用的纯度标准水平。在这项研究中,Zn-Fe/Al 2 O 3通过微波辅助湿式初始浸渍技术成功合成,用作吸附剂去除H 2 S。合成吸附剂的表征表明吸附剂表面存在的Zn和Fe的氧化物形式为氧化锌(ZnO)、磁铁矿(Fe 3 O 4)和铁酸锌(ZnFe 2 O 4)。而吸附剂的减少主要是由于氧化铁的减少。还原的吸附剂可能由氧化铝载体上的 ZnO/Fe 3 O 4 /FeO/Fe 组成。在相对较高的空速 (26,000 h -1 ) 下,吸附剂能够通过吸附剂 1ZnFe、2ZnFe 和 3ZnFe将 H 2 S 浓度从入口处的 250 ppm降低到出口处的约 45 ppm、35 ppm 和 25 ppm ; 分别。吸附剂1ZnFe、2ZnFe、3ZnFe的去除效率分别为82%、86%、90%;分别。结果还显示吸附剂寿命随着锌铁比的增加而增加。

更新日期:2021-08-09
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